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J. & E. Ifiomools.v SHUTTLE RELIEF MECHANISM FOR LOOMS.

No. 402,453. Patented Apr. 30, 1889.

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, SHUTTLE RELIEF MEGHANISM FOR LOOMS. No. 402,453., 'PatenwdAp1-..30,1a89.

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UNITED STATES PATENT OFFICE.

JOSEPH HORROCKS AND EDWIN HORROOKS, OF BRADFORD, COUNTY OF YORK, ENGLAND.

SHUTTLE-RELIEF MECHANISNI FOR LOOMSy g' SPECIFICATION forming part of Letters Patent No. 402,453, dated April 30, 1889. qApplication filed .Tune 4, 1888. Serial No. 275,947. (No model.) `.`Patent =.(li11 England June 29, 1887, No. 9,218.

dated June 29, '1887, No. 9,218,) of which the n following is a specification. l This Invention relates to improvements in v shuttle-relief mechanism for power-looms,

andits object and nature will be more fully set forth hereinafter, and particularly pointed out in the claims. I

Looms ordinarily are provided with a stoplever fitted in' connection with each shuttlebox and mounted on a rod lying beneath the lathe. Springs are arranged in connection with the said rod in such a manner that if the shuttle does not reach the shuttle-box the Vsaid stop-levers engage with frogs or shoulders on the side frames of the looIn, and thus stop it. A swell is provided in connection4 with each of the stop-levers, which projects into the shuttle-box, and, being acted upon by the shuttle, raises the stop-levers clear of the said frogs. It is obvious that the pressure of the said swells upon the shuttle will cause considerable friction as such shuttle leaves the boxes, and the object of this invention is to remove or reduce such pressure while the pick is being made, and ythus relieve the strain upon the picking-straps and picking mechanism.

In describing this invention, reference is to be had tothe accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a transverse section of a loom, representing an inner view of one of the side frames and the parts necessary to illustrate the application of the said improvements. Fig. 2 is a front view, and Fig. 3 isa plan of the same. Figa is a cross-section through the crank-shaft, showing the crank-arm, the lever beneath, and finger operating said lever. Fig. 5 represents a similar view of the same parts in different relative positions, and

Fig. G is a plan view showing the form of said lever and pawl attached thereto.

A rod, A, Inounted in bearings B, lies beneath thelathe-beam N, and each end .is provided with a stop-lever, C, one arm, D, of which is kept in contactwith the back of the swell E, pivoted at F and projecting into the shuttle-box, by the spiral spring G, stretching between the pin H and the arm J, projecting from the rod A. When the shuttle is in either-of the shuttle-boxes, it acts upon one of the said swells, and, thrusting it back, enables the tongues K on the levers C, fitted, in connection with vthe shuttle-boxes, to clear the frogs L, projecting from the side frames, and thus not. interfere with t-he motion of the lathe; but in case the shuttle does not reach' either of the shuttle-boxes the said swells are not acted upon, and therefore the tongues K engage with frogs L and the loom is stopped.

This invention consists in the device or arrangement now described for relieving the pressure of the said swells upon the shuttle immediately before a pick is made. For this purpose the spring G is made weaker than usual, it being only necessary for it to be sufficiently strong to enable the swells E to eX- ercise a slight pressure on the shuttle when the pick is made to assist it guiding the shuttle, and on one side of the loomastout spring, X, stretches from the frame M to the front end of the lever O. The lever O is mounted on a stud, Q, Xed to the side frame, M, and a loose pawl, P, is attached by a knuckle-joint to its rear end. This pawl projects beyond the end of the lever O, which is beveled, and is provided with a beveled shoulder to engage said beveled end of the lever, so that when downward pressure is exerted upon the pawl the lever O is moved with it; but when upward pressure is exerted upon the pawl the same can swing upwardly upon its pivotal end independently of the lever, as clearly shown in Figs. 4, 5, and 6. The front end of the lever O is connected by a chain, R, to an arm, S, projecting from the rod A, and thus the motion of the lathe is not interfered with. A finger, T, projecting from a hanger, U, secured to the crank-arm or pit-man V, comes in contact with the pawl P at each revo- IOO lntion of the crank-shaft W, thereby depressing the rear end of the lever O, as shown by the dotted representation of such lever and arm in Fig. 1.

The various parts are so relatively arranged that immediately before a pick is made the lever O is depressed in the rear by the finger T and the opposite end raised, thereby stretching the spring X until the chain R is left slack, and so removing the tension of the spring X from the arm S, which greatly relieves the pressure of the swell E upon the shuttle, leaving it free in the box, with the exception of the pressure occasioned by the light spring G.

In order to prevent the rebound of the going part, occasioned when the stop mechanism stops the loom, from operating the lever O and damaging the parts by interfering with the action of the said mechanism, the loose pawl P is provided, which enables the finger T to pass the lever O when the loom rebounds, or it is reversed Without actuating such lever, as clearly shown in Fig. 5.

Having now particularly described and ascertained the nature of our said invention, and in what manner the same is to be reduced to practice, we declare what we claim is- 1. The combination, with the lathe, a shuttlc-box swell, and a stop-rod having an arm engaging the swell, of a stationarily-pivoted lever, aflexible connection between one end of the lever and the stop-rod, a supplementary spring normally holding the connection taut and the arm exerting pressure on the swell, a light spring connected with the rod and holding the arm constantly bearing on the Swell, and a finger carried by a movable portion of the loom to depress the lever and relieve the swell of the pressure of the supplementary spring when apick is made, substantially as described.

2. In a loom, the combination of the frame, the lathe, a shuttle-swell,a stop-rod provided with arms, one of them bearing on the swell, alight spring secured to and exerting a constant pressure upon the rod, a lever pivoted connected to the stop-rod, causing it to exert a constant pressure on the swell, a pivoted lever, a supplemental spring secured to and tending to depress one end of the same, a chain connecting said end of the lever and the stop-rod, whereby the supplemental spring normally exerts its pressure together with the light spring upon the swell and the driving mechanism, and a finger carried by the same and adapted to intermittingly engage the lever and raise the spring end of the same, substantially as described.

4. In a loom, the frame, a lathe, a rod carried by the same having arms, a shuttleswell engaged by one of the arms carried by said ro1l,aspring connected with said rod and yieldingly causing said arm to bear on the swell, and a crankshaft and pitman to swing the lathe, in combination with a lever pivoted to the frame, a chain connecting one end of the same and an arm of said rod, a spring' tending to depress said end of the lever and hold the chain taut, a pawl pivoted to the opposite end of the lever to have an idependent upward swing, and a finger carried by the pitman and adapted to engage said pawl from above and raise the spring end of the lever, for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence of the two subscrib- -in g witnesses.

JOSEPH IIORROCKS. EDWIN HORROCKS.

I'Vitnesses:

SAMUEL A. DRACUP, DAVID ROWELL. 

